package com.aggron.util.jwt;


import com.aggron.constants.CommonConstants;
import com.aggron.util.StringUtils;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jws;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.joda.time.DateTime;


/**
 * @author  liuhuan on 2018/6/4.
 */
public class JWTHelper {
    //private static RsaKeyHelper rsaKeyHelper = new RsaKeyHelper();
    /**
     * 密钥加密token
     *
     * @param jwtInfo
     * @param priKeyPath
     * @param expire
     * @return
     * @throws Exception
     */
    public static String generateToken(IJWTInfo jwtInfo, String priKeyPath, int expire) throws Exception {
        String compactJws = Jwts.builder()
                .setSubject(jwtInfo.getUniqueName())
                .claim(CommonConstants.JWT_KEY_USER_ID, jwtInfo.getId())
                .claim(CommonConstants.JWT_KEY_NAME, jwtInfo.getName())
                .setExpiration(DateTime.now().plusSeconds(expire).toDate())
                .signWith(SignatureAlgorithm.HS512, priKeyPath)
                .compact();
        return compactJws;
    }

    /**
     * 密钥加密token
     *
     * @param jwtInfo
     * @param priKey
     * @param expire
     * @return
     * @throws Exception
     */
//    public static String generateToken(IJWTInfo jwtInfo, byte priKey[], int expire) throws Exception {
//        String compactJws = Jwts.builder()
//                .setSubject(jwtInfo.getUniqueName())
//                .claim(CommonConstants.JWT_KEY_USER_ID, jwtInfo.getId())
//                .claim(CommonConstants.JWT_KEY_NAME, jwtInfo.getName())
//                .setExpiration(DateTime.now().plusSeconds(expire).toDate())
//                .signWith(SignatureAlgorithm.RS256, rsaKeyHelper.getPrivateKey(priKey))
//                .compact();
//        return compactJws;
//    }

    /**
     * 公钥解析token
     *
     * @param token
     * @return
     * @throws Exception
     */
    public static Jws<Claims> parserToken(String token, String pubKeyPath) throws Exception {
        Jws<Claims> claimsJws = Jwts.parser().setSigningKey(pubKeyPath).parseClaimsJws(token);
        return claimsJws;
    }
    /**
     * 公钥解析token
     *
     * @param token
     * @return
     * @throws Exception
     */
//    public static Jws<Claims> parserToken(String token, byte[] pubKey) throws Exception {
//        Jws<Claims> claimsJws = Jwts.parser().setSigningKey(rsaKeyHelper.getPublicKey(pubKey)).parseClaimsJws(token);
//        return claimsJws;
//    }
    /**
     * 获取token中的用户信息
     *
     * @param token
     * @param pubKeyPath
     * @return
     * @throws Exception
     */
    public static IJWTInfo getInfoFromToken(String token, String pubKeyPath) throws Exception {
        Jws<Claims> claimsJws = parserToken(token, pubKeyPath);
        Claims body = claimsJws.getBody();
        return new JWTInfo(body.getSubject(), StringUtils.getObjectValue(body.get(CommonConstants.JWT_KEY_USER_ID)), StringUtils.getObjectValue(body.get(CommonConstants.JWT_KEY_NAME)));
    }
//    /**
//     * 获取token中的用户信息
//     *
//     * @param token
//     * @param pubKey
//     * @return
//     * @throws Exception
//     */
//    public static IJWTInfo getInfoFromToken(String token, byte[] pubKey) throws Exception {
//        Jws<Claims> claimsJws = parserToken(token, pubKey);
//        Claims body = claimsJws.getBody();
//        return new JWTInfo(body.getSubject(), StringUtils.getObjectValue(body.get(CommonConstants.JWT_KEY_USER_ID)), StringUtils.getObjectValue(body.get(CommonConstants.JWT_KEY_NAME)));
//    }
}
